Whatever your value of n is, you need to multiply it by 5 and then add 2 to get your answer. Below is how to solve it algebraically: 5n+2 = 0 (it needs to be equal to something in order to solve it, so I assumed that it equals zero) 5n = -2 n = -2/5
2sinx+1 equals 0
For y - 2y - 3y equals 0, y equals 0.
x: x2 - 81 = 0
"x equals 0" is an equality, not an inequality. The question is, therefore, not consistent.
Solve this problem -x squared -40x- 80 =0
10x=x 9x=0 x=0
Divide both sides by 8: m = 0
-y + y equals 0.